There would still be shedloads of controversy and talking points. It would even create some. If we had some challenger system like in Tennis and Cricket, the captain of the team isn't just some token figurehead but would actually have a responsibility to judge when or when not to 'challenge' a decision. Each team gets only 1 a match (so they wouldn't use it on trivial decisions and save it up incase they get fucked over).
Football really needs it.